Question: Which Class IB flammable liquid has the most fusion enthalpy?
Paraphrase: Which flammable liquid of Class IB has the most fusion enthalpy?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q21009055 . ?ent wdt:P2066 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: methanol, acetonitrile, acetone